Printing-press



(No Model.)

' J. M. JONES. PRINTING PRESS.

No. 450,368. Patented Apr. 14,1891.

UNITED STATES J OHN M. JONES, OF PALMYRA, NEIV YORK.

PRINTING-PRESS.

SPECIFICATION forming part of Letters Patent No. 450,368, dated April14, 1891.

Application filed June 9, 1890- Serial No. 354,767. (No model.)

To all whom it may concern:

Be it known that I, JOHN M. JONES, a citizen of the United States,residing at Palmyra, in the county of IVayne and'State of New York, haveinvented certain new and useful Improvements in Printing-Presses, ofwhich the following is a specification.

My invention relates to printing-presses, and is designed primarily asan improvement upon the machine represented in Letters Patent No.379,958, issued to me March 27, 1888, although the invention issusceptible of application to other styles of machines.

The present invention relates to, a novel construction of what is knownas the impression throw-off. V

In the drawings, Figure 1 is a side view of so much of a printing-pressas is necessary to illustrate the application of my invention thereto,the parts being shown in the position they occupy when the machine isready to make an impression; and Fig. 2, a similar View with the partsin such position as to prevent the formation of an impression.

A represents the main frame of the machine, and B the vibrating frame,which is pivoted at its lower end to the main frame and carries at itsupper end the bed 0. A

D indicates a shaft, which is journaled in the upper end of thevibrating frame and connected by means of pitmenE witha gear wheel F,which latter is journaled upon the main frame, as shown in both figuresand as is customary in this class of machines.

The shaft D is provided at the point where it bears in the frame B witheccentrics G, so that when the shaft is turned or rotated toward theoperator, or in the direction of the arrow in Fig. l, the frame 13 willbe caused to approach the main frame; but when the shaft is rotated awayfrom the operator, as indicated by the arrow in Fig. 2, the frame B willbe carried away from the main frame.

Secured to the end of the shaft D is a radial arm H, which is connectedby means of a rod J to the free end of a lever I, pivoted to the mainframe, the said link or rod J being connected with the arm H by means ofa bolt a, and with the lever I by means of a bolt 17. The lever I ispivoted to the main frame by a bolt or pivot c, and is so arranged thatwhen the parts are in the position to make an im-' pression its outerend will rest upon and be supported by a bracket d, as shown in bothfigures.

K indicates a hand-lever, which is pivoted to the upper end of the mainframe A upon a pin or bolt 6 in such position as to be within easy reachof the operator, and L indicates a link or rod secured at its lower endto the le ver I by means of the bolt or pivot 17 and at its upper end tothe hand-lever K by means of a bolt or pivot f.

Upon reference to the drawings it will be observed that the upper end ofthe link or rod L is curved or bent rearwardly slightly, so that whenthe impression mechanism is thrown off the pivot f, connecting the linkL with the hand-lever, shall be out of line with the pivots e and h andprevent the throwing on of the impression by reason of the jar of themachine.

In order to limit the backward movement of the handle K, the nut uponthe bolt or pivot will advisably project so as to be struck by the linkor rod L, when the hand lever is thrown back to its extreme position,though this is not necessary, any other stop answering equally as well.

One of the principal advantages of the present invention lies in thesimplicity of the construction and the ease of application of themechanism to the press.

By pivoting the operating-lever K at its lower end I am enabled to use ashorter lever, which tends to the simplification of my mechanism.

Having thus described my invention, what I claim is-= 1. In combinationwith the main frame A and the hinged frame 13, provided with a bed, ashaft D, journaled in the hinged frame and provided with eccentrics G,an arm I-I, secured to the end of the shaft D,alever I, pivoted at oneend to the main frame, a link or rod J, connecting the arm II with thefree end of lever I, a-hand-lever K, pivoted to the main frame, and alink or rod L, connected at its lower end by a bolt or pivot 19 to thefree end of lever I and at its upper end by a bolt or pivot f to thelever K above the pivot of the latter, all substantially as shown anddescribed, whereby when the levcr K is moved IO erating said throw-offmechanism, and a link or rod L, forming a part of the throw-offmechanism and connected with the hand-leverabove its pivot, the upperend of said rod L being curved, as and for the purpose set forth.

In witness whereof I hereunto set my hand 1 5 in the presence of twowitnesses.

JOHN M. JONES. Witnesses:

C. B. WHITMAN, Jos. R. TUTTLE.

